/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package co.cask.cdap.data2.transaction.stream.inmemory;
import co.cask.cdap.common.queue.QueueName;
import co.cask.cdap.data2.queue.ConsumerConfig;
import co.cask.cdap.data2.queue.QueueClientFactory;
import co.cask.cdap.data2.queue.QueueConsumer;
import co.cask.cdap.data2.transaction.queue.inmemory.InMemoryQueueService;
import co.cask.cdap.data2.transaction.stream.QueueToStreamConsumer;
import co.cask.cdap.data2.transaction.stream.StreamConsumer;
import co.cask.cdap.data2.transaction.stream.StreamConsumerFactory;
import com.google.inject.Inject;
import java.io.IOException;
/**
* In memory implementation of StreamConsumer would be using the in memory queue implementation.
*/
public final class InMemoryStreamConsumerFactory implements StreamConsumerFactory {
private final QueueClientFactory queueClientFactory;
private final InMemoryQueueService queueService;
@Inject
public InMemoryStreamConsumerFactory(QueueClientFactory queueClientFactory, InMemoryQueueService queueService) {
this.queueClientFactory = queueClientFactory;
this.queueService = queueService;
}
@Override
public StreamConsumer create(QueueName streamName, String namespace,
ConsumerConfig consumerConfig) throws IOException {
QueueConsumer consumer = queueClientFactory.createConsumer(streamName, consumerConfig, -1);
return new QueueToStreamConsumer(streamName, consumerConfig, consumer);
}
@Override
public void dropAll(QueueName streamName, String namespace, Iterable<Long> groupIds) throws IOException {
// A bit hacky to assume namespace is formed by appId.flowId. See AbstractDataFabricFacade
// String namespace = String.format("%s.%s", programId.getApplicationId(), programId.getId());
int idx = namespace.indexOf('.');
String appId = namespace.substring(0, idx);
String flowId = namespace.substring(idx + 1);
queueService.truncateAllWithPrefix(QueueName.prefixForFlow(appId, flowId));
}
}